textproduct: Rapid City

KEY MESSAGES

-After a cold night, temperatures will warm back up to seasonal norms and higher for the remainder of the week most areas

-Dry this week

DISCUSSION

(This Evening Through Sunday) Issued at 1235 PM MST Sun Dec 28 2025

Western CONUS ridge to return in the period as deep toughing re- develops over the NE Pac. The region will remain on the edge of the ridge will mild tendencies most days. There will be a frontal boundary wavering over the region with temps expected to fluctuate with passing impulses in NW flow. Secondary arctic front is currently moving through the region this afternoon, with a band of clouds and flurries moving across the region. Winds will remain breezy through afternoon and plan to leave the wind adv in place for now. Cold tonight as clear skies and light winds allow the dry/cold airmass to radiate effectively, allowing subzero temps many areas, esp the SD Plains. WAA will ensue later tonight in the west, with temps beginning to respond there. Warm front will move through Monday with temps warming all places, esp the western third. Baroclinic zone will fluctuate over the region this week with several weak impulses traversing the north side of the ridge. Most of the region will remain on the warm side of the ridge with seasonally mild conds and breezy winds at times per Pac flow. It is quite possible that one of these impulse comes in a little stronger, which could bring much cooler weather to the northeast half than what is currently advertised.

AVIATION

(For the 00Z TAFS Through 00Z Monday Evening) Issued At 427 PM MST Sun Dec 28 2025

Local MVFR CIGS/flurries from the northern Black Hills into northwest/south-central SD will dissipate this evening. Gusty northwest winds will also subside. VFR conditions are then expected Monday.

UNR WATCHES/WARNINGS/ADVISORIES

SD...Wind Advisory until 5 PM MST /6 PM CST/ this afternoon for SDZ031-032-041-043-044-046-047-049-073-077. WY...None.